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Delay terms in the slow flow
KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Nanostrukturfysik.
2016 (Engelska)Ingår i: Journal of Applied Nonlinear Dynamics, ISSN 2164-6457, E-ISSN 2164-6473, Vol. 5, nr 4, s. 471-484Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This work concerns the dynamics of nonlinear systems that are sub- jected to delayed self-feedback. Perturbation methods applied to such systems give rise to slow flows which characteristically contain delayed variables. We consider two approaches to analyzing Hopf bifurcations in such slow flows. In one approach, which we refer to as approach I, we follow many researchers in replacing the delayed variables in the slow flow with non-delayed variables, thereby reducing the DDE slow flow to an ODE. In a second approach, which we refer to as approach II, we keep the delayed variables in the slow flow. By comparing these two approaches we are able to assess the accuracy of making the simplifying assumption which replaces the DDE slow flow by an ODE. We apply this comparison to two examples, Duffing and van der Pol equations with self-feedback.

Ort, förlag, år, upplaga, sidor
L and H Scientific Publishing, LLC , 2016. Vol. 5, nr 4, s. 471-484
Nyckelord [en]
Delay, Duffing, Hopf bifurcation, Slow flow, Van der Pol
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-216849DOI: 10.5890/JAND.2016.12.007Scopus ID: 2-s2.0-85020191597OAI: oai:DiVA.org:kth-216849DiVA, id: diva2:1160852
Anmärkning

Export Date: 24 October 2017; Article; Correspondence Address: Sah, S.M.; Nanostructure Physics, KTH Royal Institute of TechnologySweden; email: smsah@kth.se. QC 20171128

Tillgänglig från: 2017-11-28 Skapad: 2017-11-28 Senast uppdaterad: 2017-11-28Bibliografiskt granskad

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